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Specific fragment of the VP2 gene (826 bp) was amplified in six samples with primer 1 and primer 2. Lane M, DNA marker (100 bp); lane N, blank control; lane P, positive control (SCDN strain); lanes 1–6: 826-bp PCR product of CPV-YA-ZA1, CPV-YA-ZA2, CPV-YA-ZA4, CPV-YA-ZA5, CPV-LS-ZA1, and CPV-CD-ZA1.
